Llewellyn p



(No Model.) 2

L. P. BLAIR.

. GAS REGULATOR. No. 251,822. r Patented Jan. 3,1882.

wniizssns. mvamoa ATTORNEY.

UNITED STATES PATENT OFFICE.

LLEWELLYN P. BLAIR, OF BALTIMORE, MARYLAND.

GAS- REGULATOR.

SPECIFICATION forming part of Letters Patent No. 251,822, dated January 3, 1882.

Application filed November 1, 1881. (No model.)

To all whom it may concern Beit known that I, LLEWELLYN P. BLAIR, of Baltimore city, State of Maryland, have invented certain new and useful Improvements in Gas-Regulators; and I hereby declare the same to be fully, clearly, and exactly described as follows, reference being had to the accompanying drawings, in which-- Figure 1 is a side elevation, and Fig. 2 a central vertical sectional view, of the device.

My invention relates to that class of apparatus used to regulate the flow of illuminatinggas to the burners, and it consists in certain improvements upon the device for which Letters Patent were granted me April 13,1880, No. 226,479.

My present improvements relate to certain features having for theirobject to increase the sensitiveness of the device, and to prevent it from accidentally getting out of order, and from being tampered with by parties who occasionally call to inspect the meter, and who are adversely interested in devices for economizing gas.

In the drawings, A A is the casing, made in two parts, having rim-flangesff, which fit closely together; and G is a diaphragm, made of prepared leathersuch as is used in gas-meters-clamped gas-tight by means of a ring, F, upon an interior flange on the shell A.

E is the gas-inlet, c the outlet, and e a screwcap closing an orifice through which any condensed matter may be removed.

J is a flaring casing leading from the gasinlet, having at its top a valve-seat, k, to which is attached a stop-valve, on, made adjustable by means of a screw, as describedinmy former patent above referred to.

K is a tubular valve within the casing J, seat ing upwardly against the stop at and partially closing the annular peripheral effiuX-channel. This valve is attached to a screw-rod, 1, which is clamped to the diaphragm G by means of nuts above and below. The nuts serve also to clamp upon the top of the diaphragm a plate, h, and cup H, the latter being designed to receive weightssuch as sh ot-and the former to cause the diaphragm to rise uniformly.

Below the diaphragm is held a bell, I, the edges of which hang just Within the cylindrical part i and approximate nearly thereto, as shown. A knob,'a, is formed on the top of the shell A,serving to shelter the orifices a for the ingress andegress of air as the diaphragm rises and falls and prevent the fraudulent loading of the cup H and the entrance of dust.

B is a ring inclosing the flanges ofthe parts A A, open at one side, and having. flanges I), through which passes the bar of a lock, 0, whereby the device is sealed.

In operation the gas enters at E, and, passing the valve K, fills the bell I and chamber i, finding egress at c to the burners. Any flm-tnations of pressure cause the diaphragm to rise, lifting the valve K and partially closing the annular channel around it.

The chamber J is made flaring, so as to prevent the impact, as it were, of the incoming gas against the valve and bell, and the increased size of the bell and the near approximation of its edges to the interior walls of the part 'i serve to increase the sensitiveness of the device and insure a true vertical movement of the diaphragm. These results flow from the described construction and arran gementof parts, by reason of the fact that any tilting of the diaphragm due to want of homogeneity of its substance throughout its area or other cause such as uneven distribution of the weights in the pan-which would otherwise occur, is prevented, as the incvption of such tilting causes the bellto swing laterally, openi ngalarger area on the depressed side than the other and admitting a freer access. of the gas to the lowest portion ofthe diaphragm. Thatincreased sen sitiveness results from such construction as maintains the diaphragm horizontal, or rather insures its true vertical movementin the center, is obvious.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In combination with the casing having valve and diaphragm, the bell I, extending downward within the part i, as and for the purpose set forth.

2. In combination with the diaphragm and, valve, the casingA A, sealed as described, and having sheltered orifice a, as and for the purpose set forth.

3. In combination with the valve and diaphragm, the hell I and easing A A, having peripheral flanges, and the inclosing-ring B. and lock 0, as set forth.

LLEWELLYN P. BLAIR.

Witnesses:

B. D. WILLIAMS, W. A. BER/DRAM. 

